Here are some steps to troubleshoot your email account:

1. Check your email account settings.
2. Ensure that the email server settings are correct (IMAP/POP and SMTP settings).
3. Check your internet connection.
4. Make sure that you are using the correct username and password to log in.
5. Clear your browser cache and cookies.
6. Restart the device.
7. Try signing in using an alternative browser.